用甲状腺素治疗的病人血清 T_4和游离 T_4浓度可升高,但除非血清 T_3和游离 T_3浓度也升高一般不出现甲状腺毒症。在这些早期的研究中采用血清中游离激素指数或类似的方法来研究游离甲状腺激素的水平。很多情况下这些方法对游离激素浓度不能精确指示。因此本研究的目的是用准确而精密的直接平衡透析法测量游离 T_4和游离 T_3浓度在监测用 Patients treated with thyroxine serum T_4 and free T_4 concentrations can be elevated, but unless serum T_3 and free T_3 concentrations are generally no thyrotoxicosis. In these early studies serum free hormone index or similar method was used to study the level of free thyroid hormone. In many cases these methods do not accurately indicate the concentration of free hormones. Therefore, the purpose of this study was to measure the free T_4 and free T_3 concentrations in an accurate and precise direct equilibrium dialysis method for monitoring